travis config: no strict host key checking for bitbucket
travis config: no strict host key checking for bitbucket

eyeye/yotta,autopulated/yotta,eyeye/yotta,iriark01/yotta,ntoll/yotta,BlackstoneEngineering/yotta,stevenewey/yotta,bridadan/yotta,ARMmbed/yotta,theotherjimmy/yotta,iriark01/yotta,ARMmbed/yotta,autopulated/yotta,stevenewey/yotta,theotherjimmy/yotta,BlackstoneEngineering/yotta,ntoll/yotta,bridadan/yotta